A cold front sagged southward into the region on April 30th, becoming positioned near the Interstate 10 and 12 corridors by the afternoon. A moist and unstable airmass remained in place from the previous day while a passing upper level disturbance helped showers and thunderstorms redevelop and intensify during the late afternoon.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS LIX wrote it up.
A cold front sagged southward into the region on April 30th, becoming positioned near the Interstate 10 and 12 corridors by the afternoon. A moist and unstable airmass remained in place from the previous day while a passing upper level disturbance helped showers and thunderstorms redevelop and intensify during the late afternoon. The strongest storms produced heavy rainfall over portions of the Baton Rouge metro area in a short period of time. The combination of slow-moving storms, locally heavy downpours, and urban drainage impacts led to flash flooding in parts of the metro area.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS New Orleans, LA wrote its last area forecast discussion before the first event at Apr 30, 12:19 PM CST, 3 hours 51 minutes earlier.
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</html>The Hammond radar (KHDC), 72 km away, was scanning. The volume nearest the first event began at 22:08 UTC.
2 flash flood. Local standard time, as filed.
Video of flooding on I-10 near the Acadian Thruway exit.
Picture of flooded residential street in the Shenandoah neighborhood in Baton Rouge.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Louisiana in 2026Every state in 2026This day in weather historyWarnings in Louisiana, April 2026
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 1334908, 1334909.